ISMI GL-1 Standard Hi-Cap Glock magazine springs are wound from certified aerospace spec materials. Manufacturing processes and proprietary design features provide enhanced performance and reliability. ISMI magazine springs are designed for extended use, magazines can be kept loaded for long periods of time with little or no loss of spring pressures.
•Replaces worn stock magazine springs for better performance in loading and unloading
•Fits standard Hi-Capacity magazine (17, 17L, 20, 22, 24, 31, 34, 35)
•Some fitting may be required